Patent US2898741A successfully refreshed from Google Patents.
US2898741A
Expired / Lapsed
US
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Spring clip for perforated pipes and the combination
Assignee: BOWERSTON SHALE CO
•
Filing: 1950-05-09
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Granted: 1959-08-11
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Expires: 1970-05-09
Abstract
No abstract record available.
Inventors
- 👤 Frank H Milliken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/12; Y; Y10; Y10T; Y10T24/00; Y10T24/34; Y10T24/3427; Y10T29/00; Y10T29/53; Y10T29/53613; Y10T403/00; Y10T403/75
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |